
Barium Sulfate
Authored by labptk1 upnvjt
Chemistry
University
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6 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
Cara pembuatan indikator methyl orange 100 ml yang benar adalah?
1 gram serbuk methyl orange dilarutkan dengan 90 ml etanol dan diencerkan dengan aquadest hingga 100 ml.
3 gram serbuk methyl orange dilarutkan dengan 60 ml etanol dan diencerkan dengan aquadest hingga 100 ml.
1 gram serbuk methyl orange dilarutkan dengan 60 ml etanol dan diencerkan dengan aquadest hingga 100 ml.
3 gram serbuk methyl orange dilarutkan dengan 90 ml etanol dan diencerkan dengan aquadest hingga 100 ml.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Apakah tujuan penambahan dari H2O2 3% pada filtrat golongan I saat identifikasi kation golongan II?
Pencuci endapan golongan II
Mengasamkan larutan sampel
Mengoksidasi Pb dan Hg menjadi bermuatan +2
Jawaban B dan C benar
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the principle of compound level calculation in gravimetry analysis?
Parts per million
Mass/mass percentage
Mass/volume percentage
Parts per billion
4.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
Ketika baraya berada di alam bebas, baraya menemukan 2 jenis air. Air pertama memiliki ciri : tidak berwarna, sedikit keruh, tidak dapat larut dalam air sabun. Sedangkan air ke 2 memiliki ciri : terdapat endapan, memiliki pH 7, dan rasa sedikit asin. Bagaimanakah cara baraya meminum air pertama?
Langsung diminum
Menggunakan filter air sederhana
Memanaskan air tersebut
Mencari sumber mata air lain
5.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
Refa akan melakukan uji vitamin C di laboratorium namun ketersediaan standar vitamin C telah habis. Agar Refa tetap dapat melakukan uji sampel vitamin C, Refa memutuskan untuk membakukan larutan iodin terlebih dahulu dengan metode iodometri. Pada metode iodometri tersebut larutan yang digunakan Refa untuk melakukan pembakuan larutan adalah
KI
6.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
Aku adalah kation golongan II B, ketika aku diperlakukan pemanasan dan ditambahkan serbuk besi serta direaksikan dengan HgCl2 aku berubah menjadi endapan berwarna putih, kation apakah aku?
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